Carburetor



Feb. 2, 1926.

J. G. VINCENT CARBURETOR Filed Jan. 13, 1916 3 Sheets-Sheet 1 Feb. 2 1926.

1 J. "G. VINCENT CARBURETOR 3 Sheets-Sheet 2 Filed Jan. 13, 1916 CARBURETOR Filed Jan. 13 1916 3 Sheets-Sheet 5 Patented FebQZ, 1926.

UNITED STATES JESSE a. manner, or DETROIT, MICHIGAN, Assmnon To mom]; moron. on 0011- rant, onnnrnorr, MICHIGAN,

; 1,571,611 PATENT. OFFICE.

A CORPORATION OF MICHIGAN.

cannnnnron.

Application filed January 1a, 1916. Serial 30.114386.

To all whom, it may concern:

Be it known that 1, Jesse G. VINCENT, a citizen of the United States-and resident of Detroit, Wayne County, State of Michigan, have invented certain new andfuseful lmprovements in C arburetors, of which the following is a specification.

'lhe present invention relates to carburet ore and more particularly to carburetors provided with a choke valvein the airintake. @ne of the objects is to provide an improved means for adjustin the resist-- ance to the opening ofthe auxlliary air intake valve in accordance with the position its of the choke valve. Another object is to provide a means for draining the air intake of any incl that may collect there and discharge it at a point remote from the carburetor.

Uther objects and the features of novelty will be apparent from the following description-taken in connection with the accompanying drawings .in which:-- i

Figure 1 is a longitudinal section through a carburetor with certain parts shown in elevation, the carburetor illustrating one "form of the invention.

Figure 2 is an end elevation of the carburetor.

Figure 3 is a plan of the same; 1 Figure at is a detail section on the hue 4-4 of Figure 1.

Figure 5 is a detail section of a modification of a portion of the carburetor shown in Figures 1 to 4. v T

Referring to the drawin v indicates the mixing chamber into w ich projects a Venturi tube 11 and with the upper end of which a manifold 12 connects, t e manifold receiving the mixture from the chamber 10 and distributing it in op osite directions to the two groups of cylin ers of the motor, the latter not being shown. The manifold 12 is preferably water-jacketed-as shown. in the drawings. A throttle valve 13 is arranged in the upper part of the mixing chamber 10 and; is controlled by a lever 14, the movement of which may be limited in any preferred manner as by the adjustable screw 15 engaging the toe 16 on the hub of the lever 14.

A iuel reservoir or tloat chamber it? is secured on the side oi "the mixing chamber 10 and receives "fuel from the main fuel tank oi the vehicle through a connection 18.

the. incl to .the tube at this main air intake 23 is horizonta ly arranged The usual needle valve 19 it" rovided to control the supply of fuel to t e reservoir 17 the valve eing controlled by the float 20 in the manner well known to those skilledin the art. .A conduit 21 conducts the fuel from the reservoir 17 to a pocket 22011 the lower side of the'main air intake 23. A nozzle 24 extends u wardly from the pocket 22 to the contracted portion 25 of the Tenturi tube 11 for the purpose of supplying oint. The

and in communication with the lower end of the tube 11. it will be observed that the tube 11 has its upper portion spaced from,

the drawings it will be observed that theaxes of the reservoir 17 the mixing chamber 10 and the air intakes 23 and 26 lie substantially in the same vertical plane so that the carburetor is relatively narrow. This is especially a parent ironr Figures 2 and] 3. An elbow 2 is secured to the outer end of the main air intake and is up-turned as shown in Figure 1 and provided with a spherical cap 28 having a series of perforations 29 through which the air is supplied to the intake. The purpose of the spherical cap 28 is to serve as a screen to prevent mud etc. from entering the main air intake.

An overflow pipe 30 communicates with the top of the reservoir 17, as clearly shown in Figure 1, and leads along the bottom of the carburetor and has a branch 31 which connects with the bottom of the main air intake, the pipe 30 serving as a drain and may extend to any suitable point belowthe mechanism of the vehicle for the gurpose of discharging the fuel carried) off ereby. The upper side of. the auxiliary air intake 26 is provided with an opening 32 in which is secured a cage 33 for the'auxiliary air in take valve 34. This valve is prelerabl formed of a conical disk 35 and a hat dis 36, spaced apart throughout their central portions, and riveted to ther adjacent their peripheries as indicate at 37. The valve may also he provided with suitable packin 38 adapted to engage the lower surtace o the cage 33 and harm a closure. The valve fi l has an upwardly extending stem 22 to lilh ltd

the cage 33.

the u per end of which is secured a sleeve or a utment 40. The stem 39 extends through a sleeve 41 on the interior of the cage 33 and on the exterior of this sleeve there is a slidable member 42 against which the lower ends of the springs 43 and-44 abut. The upper end of the spring 43 engages the abutment or sleeve 40 and normally tends to hold the valve 34 in the closed position. The upper end of the spring 44 is preferably spaced a slight distance from the lower end of the sleeve 40 so that this spring does not come into action until the valve 34 has been opened to a certain extent. The member 42 is adjustable vertically on the sleeve 41 by means of Suitable cams 45 on a shaft 46, which extends transversely. of the stem 39 and is journalled in The cams 45 appear in Flgure 4 and it will be seen that by rocking the shaft 46 the member 42 may be raised and lowered tovary the tension of the spring comes into action. Secured on the sha 46 is a lever 47 having a segment 48 secured to the hub thereofalongside of a fixed segment 49 on the cage 33. The arrangement of these segments permits the parts to be ad'- justed to the positions giving the best resuits and then by marking the segments it will always be possible to reset'the parts to the proper position. The shaft'46 has also secured thereto an arm 50 with which any 43 and the point at which the sprin suitable actuating mechanism may be connected, such actuating mechanism usuall extending to a position within easy. reaci of the' operator of the vehicle.

-Arranged in the main air intake 23 is a butterfly valve 51 carried on a shaft 52, which is journalled in the walls of the intake. The valve 51 is formed with the-cam surface 53 and this surface is engaged by the lower end of a vertically movable rod 54, preferably arranged in axial ali-neinent with the valve 34. The shaft 52 has secured thereon an arm 55 and this arm is connected with the arm 47 by means of a suitable link 56, preferably made so as to be adjustable in length. From Figure 1 it will be ap arent that as the valve 51 is swun towar the closed position, the rod 54 wil be raised and limit the extent to which the valve 34 may open. In this way the permissible opening of the valve 34 may be positively regulatediin accordance with the position of the valve 51.

In Figure 5, there is"illustrated another form of the device for controlling the auxiliary air intake valve. In this form the valve 34 is of the conical type and the stem 39- has a downward extension 39" which extends through the walls of the main and auxiliary air intakes and is adapted to be engaged by the cam 53 on the valve 51 so that the extent of opening of the valve 34 will be limited in accordance with the position of the valve 51. The extension 39 also serves as a guide for the valve 34 cooperating with the stem 39, so that the valve will be guided below as well as above.

In view of the fact that all of the various adjustments of the parts of the carburetor have a very material effect upon the action of the carburetor as a whole it is desirable to have an expert make these adjustments and then so seal the parts that the different adjustments may not be tampered with. The springs 43 and 44 are enclosed in a suitable housing 57 anda sealing wire 58 extends through the securing device 59 for this housing and also througlr the bolts 60 which secure the cage 33 on the auxiliary air intake 26. The'ends of the wire 58 are brought together and secured in a suitable seal 61. In a similar manner a sealing wire 62 secures the screw 15 and prevents a change in adjustment Without breaking the seal 63. 1

While I have illustrated what I now consider to be the preferred form of my invention it will be understood that the various details are subject to change and that the invention is not limited to the details shown and described but comprises all modifications that come within the scope of the appended claims.

Having thus I claim is:

1. In a carburetor, the combination of a mixing chamber, means for supplying fuel thereto. main and auxiliary air intakes. a butterfly valve in the main intake provided with a cam surface, a valve in the auxiliary air intake. and a continuous rod extending through the walls of said intakes between said valves arranged; to engage said cam surface and restrict the opening of the auxiliary intake valve in accordance with the position of the butterfly valve.

2. In a carburetor, in combination. a mix ing chamber, means for supplying fuel thereto, main and auxiliary air intakes arranged adjacent each other, a butterfly valve in the main air intake comprising a rotatably mounted disk having a cam surface, a. valve controlling the auxiliary air intake described my invention, what having a stem extending through the walls JESSE G. VINCENT. 

